Too much rain: China's floods roil hydropower, corn supplies

A general view shows a flooded area in Liuzhou, Guangxi province, China, July 2, 2017. Picture taken July 2, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT.

People make their way with boats through a flooded area in Liuzhou, Guangxi province, China, July 2, 2017. Picture taken July 2, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

Rescuers transfer residents with a boat at a flooded area in Guilin, Guangxi province, China July 2, 2017. Picture taken July 2, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT.

Rescuers row as they transfer residents with a boat at a flooded area in Guilin, Guangxi province, China July 2, 2017. Picture taken July 2, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT.

Paramilitary policemen sweep a flooded street in Guilin, Guangxi province, China July 3, 2017. Picture taken July 3, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

People remove items from mud after a flood at Qiaotouhe town in Lianyuan, Hunan province, China, July 4, 2017. Picture taken July 4, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

Rescuers pile up sandbags to block flood waters at a flooded village in Yiyang, Hunan province, China July 4, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

People spend time at a flooded bank of the Yangtze River in Wuhan, Hubei province, China July 3, 2017. Picture taken July 3, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.

ZHAOQING, CHINA - JULY 04: Citizens take boat to move on the flooded street on July 4, 2017 in Zhaoqing, Guangxi Province of China. Torrential rains caused floods in many parts of south China. The water level rose above the warning line in Zhaoqing by 5 pm Monday. (Photo by Zhang Youqiong/VCG via Getty Images)

WUHAN, CHINA - JULY 03: A man swims at flooded Yangtze River in Hankou on July 3, 2017 in Wuhan, Hubei Province of China. Heavy rains caused floods in many parts of south China. The water level of the Hankou session of Yangtze River rose above the warning line by 4 pm Monday. (Photo by VCG via Getty Images)

Rescuers evacuate people by boat during a flood in Xinshao county, Hunan province, China, July 2, 2017. REUTERS/Stringer ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT.

This picture taken on July 5, 2017 shows people standing on a dock in the Yangtze River along the River Beach Park in Wuhan, Hubei Province after heavy rains caused the water levels to rise.
Heavy rains and windstorms caused floods and landslides in several cities in Hubei, resulting in the deaths of six people / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP/Getty Images)

This picture taken on July 5, 2017 shows a man swimming with his dog in the Yangtze River along the River Beach Park in Wuhan, Hubei Province after heavy rains caused the water levels to rise.
Heavy rains and windstorms caused floods and landslides in several cities in Hubei, resulting in the deaths of six people / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP/Getty Images)

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BEIJING (Reuters) - Severe flooding across southern China has forced the world's largest power plant to slash capacity on Tuesday, delayed grain on barges and damaged farms along the Yangtze River, as the death toll rose to 56 and economic costs hit almost $4 billion.

Heavy rainfall, mudslides and hail caused by the annual rainy season has killed 56 people and 22 people were missing across 11 provinces and regions as of Tuesday morning, according to the Ministry of Civil Affairs.

More than 750,000 hectares (1.85 million acres) of crops have been damaged and direct economic losses totaled more than 25.3 billion yuan ($3.72 billion), it said.

The government said it had disbursed 700 million yuan ($103 million) in emergency aid to four flood-hit provinces - Zhejiang, Jiangxi, Hunan and Guizhou.

Rain in the southern provinces is expected to ease in the coming days, but weather forecasters predict downpours will move to the southwestern province of Sichuan.

In what analysts said was a move unprecedented in its scale, the Three Gorges and Gezhouba, two of China's top hydropower plants, closed as much as two-thirds of their capacity to avert flooding further downstream on the Yangtze River.

The move stoked concerns about electricity supplies from China's second-largest power source as a heatwave continued to scorch northern parts of the country, raising the export prices of coal, the fuel the country uses to produce most of its power.

The annual rainy season, which arrived in the second half of June, has hit southern Hunan province, one of the nation's largest hog and freshwater fish producers, the most.

High water levels on the Yangtze, Asia's largest river, also slowed barges carrying grain from northern ports to the south, spurring a rise in freight rates and physical corn prices in some regions, analysts and corn buyers said.

Zhang Yi, a purchase manager at a feed producer in Hunan, said he had three ships carrying about 5,000 tonnes of corn stuck on waterways near the port of Changsha, the capital of Hunan, since Friday.

CORN PRICES RISE ON BARGE DELAYS

Spot corn prices at major ports along the Yangtze and its tributaries, including Changsha, Nanchang in Jiangxi province, and Wuhan in Hubei province, have risen by 30 yuan to 1,800 yuan a ton since last week, according to data provided by China National Grain and Oils Information Center, a government think tank.

China usually transports corn from northern growing regions to the ports in the south. Then the grain is shipped along the Yangtze and its branches, to central and western provinces including Hunan, Hubei, and Sichuan.

The Yangtze river's large watershed also accounts for 60 percent of the nation's freshwater fish output.

Cao Delian, manager of the Dabeinong Changlin fish farm, estimated that he has lost about one-third of his carp due to the deluge.

"It's the biggest loss we've seen in at least 5 years," he told Reuters.

On Monday, a natural gas pipeline in Guizhou owned by China National Petroleum Corp collapsed due to a mudslide, causing an explosion that killed at least eight people and injured another 35.

In his office in Liuyang, a city near Changsha, Zhang was hoping water levels would continue to subside on Wednesday.

"I have stocks of corn that can last for four to five days. As long as it does not rain tomorrow, Changsha port can resume operation and I will get my corn offloaded," Zhang said.